2008 tahoe code p0304

[glowingbubble]

i have a 2008 tahoe was working fine all sudden engine light started blink car was loosn power misfiring . I checked light code says #4 misfiring i change spark plug wires , spark plugs and coil n injector for #4 i then reset code and its still sayn same code n nothing has changed any suggestion

 

[Dustin Jackson]

What other symptoms do you have? Is the motor making any unusual sounds?

 

[OR VietVet]

1 period and 1 comma later, I suggest you check for a vacuum leak. What CEL code did you see?